import router from './router'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import {getToken} from '@/utils/auth' // get token from cookie
import getPageTitle from '@/utils/get-page-title'

NProgress.configure({showSpinner: false}) // NProgress Configuration

let permissionList = [];
const whiteList = ['/login'] // no redirect whitelist

function checkRoutePermission(currentRoute) {
  if (currentRoute.meta && currentRoute.meta.permission && permissionList.includes(currentRoute.meta.permission)) {
    currentRoute.hidden = false
  } else {
    currentRoute.hidden = true
  }
  //判断顶级路由下边有没有子路由
  if (currentRoute.children) {
    let childrenRoute = currentRoute.children;
    childrenRoute.forEach(route => {
      checkRoutePermission(route);
    })
  }

}

router.beforeEach(async (to, from, next) => {
  // start progress bar
  NProgress.start()

  // set page title
  document.title = getPageTitle(to.meta.title)

  // determine whether the user has logged in
  const hasToken = getToken()

  if (hasToken) {
    let routes = router.options.routes
    permissionList = window.sessionStorage.getItem("permissionList").split(",");
    if (permissionList) {
      routes.forEach(route => {
        if (route.meta && route.meta.permission) {
          checkRoutePermission(route)
        }
      })
    }
    if (to.path === '/login') {
      // if is logged in, redirect to the home page
      next({path: '/'})
      NProgress.done()
    } else {
      next();
      NProgress.done()
    }
  } else {

    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  // finish progress bar
  NProgress.done()
})
